refactor: remove unused collections and documentation files

- Deleted the 'index' and 'mcp' collections from content.config.ts.
- Removed the 'docs.md' file containing ArtMCP documentation.
- Deleted the 'index.md' file which served as a welcome page for ArtAPI.

app/pages/docs.vue

@@ -1,8 +1,4 @@
 <script setup lang="ts">
-const { data: _docs } = await useAsyncData('docs', () =>
-  queryCollection('docs').first()
-)
-
 const tools = [
   {
     name: 'activity',
@@ -86,7 +82,7 @@ const apiEndpoints = [
       <UContainer class="py-16">
         <div class="text-center text-white">
           <UBadge
-            color="white"
+            color="neutral"
             variant="subtle"
             size="lg"
             class="mb-4"
@@ -103,7 +99,7 @@ const apiEndpoints = [
             <UButton
               to="/"
               size="lg"
-              color="white"
+              color="neutral"
               variant="solid"
               icon="i-heroicons-arrow-left"
             >
@@ -113,7 +109,7 @@ const apiEndpoints = [
               to="https://github.com/ArthurDanjou/artapi"
               target="_blank"
               size="lg"
-              color="white"
+              color="neutral"
               variant="outline"
               icon="i-simple-icons-github"
             >
@@ -293,7 +289,7 @@ const apiEndpoints = [
                     class="flex gap-2"
                   >
                     <UBadge
-                      color="blue"
+                      color="primary"
                       variant="subtle"
                     >
                       {{ input.name }}
@@ -398,7 +394,7 @@ const apiEndpoints = [
             class="flex items-center gap-3 p-3 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors"
           >
             <UBadge
-              color="green"
+              color="success"
               variant="subtle"
               class="font-mono text-xs"
             >

app/pages/index.vue

@@ -1,8 +1,4 @@
 <script setup lang="ts">
-const { data: _index } = await useAsyncData('index', () =>
-  queryCollection('index').first()
-)
-
 const features = [
   {
     icon: 'i-heroicons-cpu-chip',
@@ -86,7 +82,7 @@ const resources = [
             to="https://github.com/ArthurDanjou/artapi"
             target="_blank"
             size="xl"
-            color="gray"
+            color="neutral"
             variant="outline"
             icon="i-simple-icons-github"
           >
@@ -96,25 +92,25 @@ const resources = [
 
         <div class="flex flex-wrap gap-3 justify-center text-sm">
           <UBadge
-            color="blue"
+            color="success"
             variant="subtle"
           >
             Nuxt 4
           </UBadge>
           <UBadge
-            color="green"
+            color="success"
             variant="subtle"
           >
             MCP Protocol
           </UBadge>
           <UBadge
-            color="purple"
+            color="primary"
             variant="subtle"
           >
             TypeScript
           </UBadge>
           <UBadge
-            color="orange"
+            color="warning"
             variant="subtle"
           >
             Edge Deployed
@@ -181,7 +177,7 @@ const resources = [
           :key="resource.label"
           :to="resource.to"
           target="_blank"
-          color="gray"
+          color="neutral"
           variant="outline"
           size="lg"
           block
@@ -270,7 +266,7 @@ curl https://api.arthurdanjou.fr/api/skills</code></pre>
             to="/api/profile"
             target="_blank"
             size="xl"
-            color="gray"
+            color="neutral"
             variant="outline"
             icon="i-heroicons-globe-alt"
           >